code: def test_class_getitem_errors(self):
      class C_too_few:
          def __class_getitem__(cls):
              return None
  
      with self.assertRaises(TypeError):
          C_too_few[int]
  
      class C_too_many:
          def __class_getitem__(cls, one, two):
              return None
  
      with self.assertRaises(TypeError):
          C_too_many[int]
  
imports: import unittest
  from test import support
label_desc: Use image node_id 8 for calling the TestClassGetitem obj's underlying member method code with example usage: obj.test_class_getitem_errors() and returns: None, None